FOSSILS
An Introduction to the Study of Fossils. By H. W. Shimer, 1933, Macmillan Co. An introductory textbook about fossil plants and animals.
Invertebrate Paleontology. By W. H. Twenhofel and R. P. Shrock, 1935, McGraw-Hill Book Co.
Textbook of Geology Part II—Historical Geology. 4th Edition, by C. Schuchert and C. O. Dunbar, 1941, John Wiley and Sons. The story of the development of life through the ages.